Reference for “CSS Multi-column Layout Module”

@TechReport{Lie:09:CML,
  author      = "H\aa{}kon Wium Lie",
  title       = "{CSS} Multi-column Layout Module",
  month       = dec,
  note        = "http://www.w3.org/TR/2009/CR-css3-multicol-20091217",
  year        = "2009",
  bibsource   = "http://w2.syronex.com/jmr/w3c-biblio",
  type        = "Candidate Recommendation",
  institution = "W3C",
}